Common parts of TMS99xx CPUs

.gitattributes

@@ -926,6 +926,7 @@ src/emu/cpu/tms9900/tms9980al.c svneol=native#text/plain
 src/emu/cpu/tms9900/tms9995.c svneol=native#text/plain
 src/emu/cpu/tms9900/tms9995.h svneol=native#text/plain
 src/emu/cpu/tms9900/tms9995l.c svneol=native#text/plain
+src/emu/cpu/tms9900/tms99com.h svneol=native#text/plain
 src/emu/cpu/uml.c svneol=native#text/plain
 src/emu/cpu/uml.h svneol=native#text/plain
 src/emu/cpu/unsp/unsp.c svneol=native#text/plain

src/emu/cpu/tms9900/tms99com.h

@@ -0,0 +1,74 @@
+// license:BSD-3-Clause
+// copyright-holders:Michael Zapf
+/*
+    Common definitions for all TMS processors
+
+    Types of TMS99xx processors:
+    TI990/9    Early implementation, used in a few real-world applications, 1974
+               very similar to mapper-less 990/10 and tms9900, but the Load
+               process is different
+
+    TI990/10   Original multi-chip implementation for minicomputer systems, 1975
+
+    TI990/12   Multi-chip implementation, faster than 990/10. Huge instruction set
+
+    TMS9900    Mono-chip implementation, 1976. Used in the TI-99/4(A) computer.
+
+    TMS9940    Microcontroller with 2kb ROM, 128b RAM, decrementer, CRU bus, 1979
+
+    TMS9980    8-bit variant of tms9900.  Two distinct chips actually : tms9980a
+               and tms9981 with an extra clock and simplified power supply
+
+    TMS9985    9940 with 8kb ROM, 256b RAM, and a 8-bit external bus, c. 1978 (never released)
+
+    TMS9989    Improved 9980, used in military hardware.
+
+    SBP68689   Improved 9989, built as an ASIC as 9989 was running scarce
+
+    TMS9995    TMS9985-like, with many improvements (but no ROM). Used in the
+               TI-99/8 prototype and the Geneve computer.
+
+    TMS99000   Improved mono-chip implementation, meant to replace 990/10, 1981
+    TMS99105   This chip is available in several variants which are similar
+    TMS99110   but emulate additional instructions, thanks to the so-called
+               macrostore feature.
+
+    In this implementation we only consider TMS9900, 9980, and 9995. The
+    remaining types are implemented on an own code base as they introduce
+    significant changes (e.g. privileged mode, address mapper). For now we
+    leave the implementation of the rest up to 99xxcore.h.
+*/
+
+#ifndef __TMS99COMMON_H__
+#define __TMS99COMMON_H__
+
+#define MCFG_TMS99xx_ADD(_tag, _device, _clock, _prgmap, _iomap, _config)       \
+	MCFG_DEVICE_ADD(_tag, _device, _clock)      \
+	MCFG_DEVICE_PROGRAM_MAP(_prgmap)            \
+	MCFG_DEVICE_IO_MAP(_iomap)                  \
+	MCFG_DEVICE_CONFIG(_config)
+
+enum
+{
+	TI990_10_ID = 1,
+	TMS9900_ID = 3,
+	TMS9940_ID = 4,
+	TMS9980_ID = 5,
+	TMS9985_ID = 6,
+	TMS9989_ID = 7,
+	TMS9995_ID = 9,
+	TMS99000_ID = 10,
+	TMS99105A_ID = 11,
+	TMS99110A_ID = 12
+};
+
+enum
+{
+	IDLE_OP = 2,
+	RSET_OP = 3,
+	CKOF_OP = 5,
+	CKON_OP = 6,
+	LREX_OP = 7
+};
+
+#endif /* __TMS99COMMON_H__ */